1,2,4-Trichlorobenzene
Gander Woods Pump District
1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 5 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 5 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 5 ppb
The EWG Health Guideline of 5 ppb for 1,2,4-trichlorobenzene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against hormone disruption.
EPA Maximum Contaminant
Level (MCL): 70 ppb
The legal limit for 1,2,4-trichlorobenzene, established in 1992, was based on a toxicity study in laboratory animals conducted in 1981. This limit may not fully protect against hormone disruption.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-11-13 | S770725 | ND |
| 2019-01-29 | S812529 | ND |
| 2019-04-29 | S847907 | ND |
| 2019-08-13 | S865159 | ND |
| 2019-08-13 | S900434 | ND |
| 2019-10-15 | S895862 | ND |
| 2020-01-08 | S920014 | ND |
| 2020-04-16 | S901920 | ND |
| 2020-08-25 | S901704 | ND |
| 2020-10-13 | S998171 | ND |
| 2021-01-26 | S1035134 | ND |
| 2021-04-28 | S1066480 | ND |
| 2021-07-26 | S1086024 | ND |
| 2021-10-22 | S1121011 | ND |
| 2022-01-10 | S1136749 | ND |
| 2022-04-05 | S1120952 | ND |
| 2022-07-29 | S1199099 | ND |
| 2022-08-19 | S1206469 | ND |
| 2022-10-13 | S1230647 | ND |
| 2023-01-30 | S1257225 | ND |
| 2023-04-28 | S1257101 | ND |
| 2023-07-31 | 810-72350-9 | ND |
| 2023-10-31 | 810-83409-1 | ND |
| 2023-10-31 | 810-83409-2 | ND |